Consolidated Statement of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock Series A Preferred Stock	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss
Balance, beginning balance (shares) at Feb. 28, 2022			24,688
Balance, beginning balance at Feb. 28, 2022	$ 667,365		$ 24,688	$ 85,847	$ 584,154	$ (27,324)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	7,118			7,118
Issuance of Class A convertible preferred stock in exchange for convertible debt (in shares)		240
Issuance of Class A convertible preferred stock in exchange for convertible debt	233,722	$ 240		233,482
Common stock issued under stock-based plans and related income tax expense (shares)			136
Common stock issued under stock-based plans and related income tax expense	(2,592)		$ 136	(2,728)
Common stock issued under employee stock purchase plan (shares)			52
Common stock issued under employee stock purchase plan	1,766		$ 52	1,714
Dividends on preferred stock	(4,640)				(4,640)
Cash dividends paid on common shares	(12,664)				(12,664)
Net income (loss) available to common shareholders	(54,035)				(54,035)
Other comprehensive income	16,473					16,473
Balance, ending balance (shares) at Nov. 30, 2022		240	24,876
Balance, ending balance at Nov. 30, 2022	852,513	$ 240	$ 24,876	325,433	512,815	(10,851)
Balance, beginning balance (shares) at Aug. 31, 2022			24,862
Balance, beginning balance at Aug. 31, 2022	859,621		$ 24,862	323,386	541,203	(30,070)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,348			2,348
Common stock issued under stock-based plans and related income tax expense (shares)			14
Common stock issued under stock-based plans and related income tax expense	(287)		$ 14	(301)
Dividends on preferred stock	(3,600)				(3,600)
Cash dividends paid on common shares	(4,246)				(4,246)
Net income (loss) available to common shareholders	(20,542)				(20,542)
Other comprehensive income	19,219					19,219
Balance, ending balance (shares) at Nov. 30, 2022		240	24,876
Balance, ending balance at Nov. 30, 2022	852,513	$ 240	$ 24,876	325,433	512,815	(10,851)
Balance, beginning balance (shares) at Feb. 28, 2023		240	24,912
Balance, beginning balance at Feb. 28, 2023	853,460	$ 240	$ 24,912	326,839	506,042	(4,573)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	6,207			6,207
Common stock issued under stock-based plans and related income tax expense (shares)			123
Common stock issued under stock-based plans and related income tax expense	(791)		$ 123	(914)
Common stock issued under employee stock purchase plan (shares)			42
Common stock issued under employee stock purchase plan	1,465		$ 42	1,423
Dividends on preferred stock	(10,800)				(10,800)
Cash dividends paid on common shares	(12,751)				(12,751)
Net income (loss) available to common shareholders	83,744				83,744
Other comprehensive income	616					616
Balance, ending balance (shares) at Nov. 30, 2023		240	25,077
Balance, ending balance at Nov. 30, 2023	921,150	$ 240	$ 25,077	333,555	566,235	(3,957)
Balance, beginning balance (shares) at Aug. 31, 2023		240	25,077
Balance, beginning balance at Aug. 31, 2023	898,077	$ 240	$ 25,077	331,366	547,208	(5,814)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,189			2,189
Dividends on preferred stock	(3,600)				(3,600)
Cash dividends paid on common shares	(4,263)				(4,263)
Net income (loss) available to common shareholders	26,890				26,890
Other comprehensive income	1,857					1,857
Balance, ending balance (shares) at Nov. 30, 2023		240	25,077
Balance, ending balance at Nov. 30, 2023	$ 921,150	$ 240	$ 25,077	$ 333,555	$ 566,235	$ (3,957)